Mr. Bloop put a vial of protein powder in the-21C freezer. It was accidentally left out on the lab bench by one of his students. It had been there for most of the day, and the temperature in the lab was19C. Once in the freezer, the temperature of the powder began to drop at a rate of4C every5minutes. Assuming the temperature change rate was constant (which it really isn't, but we'll pretend), how long would it take to get to the temperature of the freezer?

3.

The melting point of trifluoroacetophenone is-40C. The melting point of 4-nitroacetophenone is81C. Another similar compound melts at-35C. What is the average melting point of the compounds?

4.

Organic compounds of varying carbon chain lengths have boiling points that increase as the number of carbon atoms increases. Methane (CH4) boils at-164C. If another carbon compound with a longer carbon chain boils at a temperature that is123C higher than the boiling point of methane, what is its boiling point?

5.

Certain mites in the arctic thrive at an average temperature of-35C. They also do well at temperatures of up to28C. What is the temperature range acceptable to these arctic mites?